Bacterial endophytes from Lycoris radiata promote the accumulation of Amaryllidaceae alkaloids.

•Firstly reporting the composition and diversity of bacterial endophytes in L.radiata.•Detecting the plant growth-promoting abilities of bacterial endophytes in L.radiata.•Finding 3 bacterial endophytes can increase the accumulation of biomass of L. radiata.•Finding 14 bacterial endophytes can promote the synthesis of Amaryllidaceae alkaloids.•Providing a strategy to enhance the yield of alkaloids during L. radiata cultivation.